在 rails5 中使用 rails_admin 时出错

Question

我正在尝试将 rails_admin 与 rails5 应用程序一起使用。 rails_admin 0.8.1 没有工作，因为

Bundler could not find compatible versions for gem "rails": In snapshot (Gemfile.lock): rails (= 5.0.0.beta1)

In Gemfile: rails (< 5.1, >= 5.0.0.beta1)

rails_admin was resolved to 0.8.1, which depends on
  rails (~> 4.0)

然后我尝试使用 github 中的最新代码

gem 'rails_admin', git: 'https://github.com/sferik/rails_admin.git'

现在我遇到了相互冲突的机架依赖项。

In snapshot (Gemfile.lock): rack (= 2.0.0.alpha)

In Gemfile: rails (< 5.1, >= 5.0.0.beta1) was resolved to 5.0.0.beta1, which depends on actionmailer (= 5.0.0.beta1) was resolved to 5.0.0.beta1, which depends on actionpack (= 5.0.0.beta1) was resolved to 5.0.0.beta1, which depends on rack (~> 2.x)

rails_admin was resolved to 0.8.1, which depends on
  rack-pjax (~> 0.7) was resolved to 0.7.0, which depends on
    rack (~> 1.3)

rails (< 5.1, >= 5.0.0.beta1) was resolved to 5.0.0.beta1, which depends on
  sprockets-rails (>= 2.0.0) was resolved to 3.0.0, which depends on
    sprockets (>= 3.0.0) was resolved to 3.5.2, which depends on
      rack (< 3, > 1)

devise was resolved to 4.0.0.pre.dev, which depends on
  warden (~> 1.2.3) was resolved to 1.2.4, which depends on
    rack (>= 1.0)

devise was resolved to 4.0.0.pre.dev, which depends on
  warden (~> 1.2.3) was resolved to 1.2.4, which depends on
    rack (>= 1.0)

现在开始使用rails5是不是太早了？我应该回到 rails4.2 吗？

Answer 1

我看到 RA 有 Rails5 gemfile https://github.com/sferik/rails_admin/blob/master/gemfiles/rails_5.0.gemfile。我会尝试升级到该文件中提到的所有宝石。

Answer 2

我通过以下方式修复：

gem 'rails_admin', github: 'sferik/rails_admin'
gem 'rack-pjax', github: 'afcapel/rack-pjax'
gem 'remotipart', github: 'mshibuya/remotipart', ref: '3a6acb3'

见this article